| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Materials and Chemistry for Molten Salt Systems
|
| Presentation Title |
Kinetic Properties of Fe2+/Fe, Ni2+/Ni, Cr2+/Cr and Cr3+/Cr Reactions in Molten MgCl2-KCl-NaCl Salt |
| Author(s) |
Qiufeng Yang, Jinsuo Zhang |
| On-Site Speaker (Planned) |
Qiufeng Yang |
| Abstract Scope |
Reliable measurement of exchange current density i0 is important for systems with molten salt as electrolyte or heat transfer fluid. i0 of Fe2+/Fe, Ni2+/Ni, Cr2+/Cr, Cr3+/Cr reaction in MgCl2-KCl-NaCl at different temperatures (600°C-800°C) and concentrations (1wt%-0.01wt%) are reported, which are determined by non-linear curve fitting method using modified kinetic equation with mass transfer effect considered. It’s confirmed that significant errors can be introduced using conventional techniques, i.e., Tafel plot, polarization resistance and electrochemical impedance spectroscopy, which result from multiple assumptions during calculations. The standard rate constant k0 of Fe2+/Fe estimated by curve fitting method are 4.5356-9.0323×10-4 cm/s in this study. Relation of lnk0 and 1/T demonstrates good linearity, which indicates that temperature dependence of k0 obeys Arrhenius law. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |